Attachments for the Komatsu PC138US-8 weight range
- Bucket line
- DB - heavy duty digging bucket500–1,200 mm wide
- We usually reply within 1 working day
- We check the fit before we send the quote
- Every offer names the dispatch week
- If a bracket we made is wrong and does not fit your machine, we replace it.
How is the attachment mounted on this machine?
Tell us what is on the machine now. It narrows the sizes we show and goes with your enquiry. It does not confirm fit: we check the bracket before we send the quote.
Catalogue sizes for the PC138US-8
Each size below has a catalogue row rated for a carrier of 13,500 – 15,000 kg operating weight. Tell us which sizes you want and we reply with an offer.
Each family shows its candidate models by operating-weight range.
The attachments buyers in your market ask for first, sized for the PC138US-8.
On a narrow screen the table scrolls sideways.
Buckets
Tools
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
Non-bucket attachments | ||||
| TH - hydraulic thumb for excavator | TH-16 | 700 | 310 | |
| AC - excavator asphalt cutters | AC-18 | 99 | ||
| MR - heavy duty excavator multi-ripper | MR-17 | 1,300 | 415 | |
| RIP - heavy duty ripper | Ripper-C | 280 | ||
| DuoRIP - double ripper for root extraction | Duo-Ripper-18 | 450 | 380 | |
| GRB - excavator grading beam | GRB midi · 6 variants, GRB maxi · 6 variants | 2,000–3,000 | 216–680 | |
Other mini-ex attachments | ||||
| LRS - short land rakes for mini-excavators | LRS-15 | 1,980 | 380 | |
| RIP mini - ripper shank for mini-excavator | Ripper-14 | 221 | ||
| MR mini - multi-ripper for mini-excavator | MRF 140 · 2 width variants | 1,000–1,200 | 221–228 | |
Quick couplers
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
| QC-S - S-System Scandinavian quick-couplerStart herePrice & lead timeGet price & lead timeS-System (Scandinavian) | QC-S60, QC-U-S60 | 115 | ||
| CW - CW-System compatible quick-couplerCW-System | CW-20, CW-20 S, CW-30, CW-30 S, CW-U-20, CW-U-20 S, CW-U-30, CW-U-30 S | 180–230 | ||
| QC-HS / QC-MS - MS-System compatible quick-couplerMS system | QC-HS-10, QC-MS-10, QC-U-HS-10 | 200 | ||
| QC-PG - pin-grabber quick-coupler for factory bracketsPin-grabber | QC-PG-65, QC-PG-70, QC-ML-M-60, QC-ML-M-65, QC-U-PG-65, QC-U-PG-70 | 105–260 |
Welded to EN ISO 3834-2. Agree it as a standing term of supply and the EN 10204 3.1 certificate ships with every attachment. You also get the CE declaration of conformity for every attachment. See the certificates.
Message us on WhatsAppPhotos and voice notes are welcome.Which coupler is on your machine?
Pick the system on your machine and we put it in your enquiry. We check the bracket before we send the quote.
How to measure your coupler
Not sure which system it is? Three measurements tell us which bracket you need.
- Measure the diameter of both pins.
- Measure the distance between the pin centres.
- Measure the width between the inside faces of the ears.
If the coupler has a make or type printed on it, send that too.
Before you order: check the interface
The weight class of the Komatsu PC138US-8 sizes the attachment. It does not tell you the pin diameter, the pin spacing or the stick width, and those decide whether an attachment fits. Measure them on the machine, or send us the measurements of the bucket it runs today.
At this weight the choice is mostly about the material. A general purpose bucket suits soil and gravel, a reinforced bucket with thicker wear parts suits mixed ground and broken rock, and the quick coupler on the machine sets the bracket every attachment needs.
Quick coupler brackets at this weight
In our model tables, the attachments listed for the Komatsu PC138US-8 at its weight are built with these brackets. Each code opens the models that list it.
- Measure the diameter of both bucket pins.
- Measure the distance between the pin centres.
- Measure the inside width between the stick ears.
- If the machine runs a quick coupler, note its make and type.
What these terms mean:
How to choose an attachment for the job:
Send me the spec sheet for my machine
Pick a bucket line and we email you its spec sheet, with the sizes we build for the PC138US-8.
Send this answer to a colleague or dealer
Komatsu PC138US-8: DBF - flat-top digging bucket for quick coupler (DBF-160)
Sizes are matched to the published operating weight of the PC138US-8.
- Weight Class
- Large Excavator (10–30 t)
- Operating Weight
- 13,500 – 15,000 kg
- Family-owned group, founded in 1996
- More than 50,000 attachments delivered
- Built in our own factory in Poland
Operating weight as published by Komatsu, retrieved 2026-09-10. Source
Komatsu PC138US-8: machine data
- Operating weight
- 13,500 – 15,000 kg
- Engine power
- 72 kW
- Maximum digging depth
- 5,900 mm
- Maximum dump height
- 7,350 mm
- Bucket breakout force
- 93.2 kN
- Arm crowd force
- 71.6 kN
- Max reach
- 8,600 mmmaker's document (komatsu.eu)
- Arm length
- 2,100–3,000 mmmaker's document (komatsu.eu)
- Main pump flow
- 242 l/minmaker's document (komatsu.eu)
- Bucket capacity
- 0.8 m³maker's document (komatsu.eu)
- Lift capacity
- 2,130 kgmaker's document (komatsu.eu)
- Transport width
- 2,490 mmmaker's document (komatsu.eu)
As published by Komatsu, retrieved 2026-09-17. Source
- Pin diameter
- 60 mmSource: Tuff Buckets and DiggerCity.
A guide only. Measure the pins before you order.
What the PC138US-8 figures mean for its attachments
- The main pump delivers up to 242 l/min at 355 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- It digs down to 5,900 mm. That is the deepest trench it can open.
- Its maximum reach is 8,600 mm.
- It dumps at up to 7,350 mm, so a truck or skip side has to sit below that height.
- Komatsu offers arms from 2,100 to 3,000 mm. A longer arm reaches further, a shorter one handles a heavier bucket.
- Komatsu lists a bucket capacity of 0.8 m³.
- Bucket breakout force is 93.2 kN and arm crowd force 71.6 kN. That is the force a bucket or ripper works with at the tooth.
- Komatsu gives a lifting capacity of 2,130 kg. Check a heavy grab or hammer, plus its load, against the full load chart.
- For transport it measures 7,260 x 2,490 x 2,850 mm (length, width, height).
- Engine power is 72 kW.
Figures as published by Komatsu in its own documents.
How the PC138US-8 compares with its neighbours
The nearest models by weight, with the difference to the PC138US-8 in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow |
|---|---|---|---|
| PC138US-8 | 13.5 t | 5,900 mm | 242 l/min |
| Komatsu PC138US-2 | 13.4 t (-0.1 t) | 5,480 mm (-420) | 226 l/min (-16) |
| Komatsu PC130-6 | 13.3 t (-0.2 t) | 6,020 mm (+120) | 226 l/min (-16) |
| JCB 110W | 13.5 t | 4,410 mm (-1,490) | 158.4 l/min (-83.6) |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
PC138US-8: what the brochure names
Features Komatsu names in its own brochure for the PC138US-8. Some of them may be optional, so check the machine's spec before you order.
- A short tail swing, for work next to walls and traffic.
- Work modes you select from the cab.
- A dozer blade.
- A load-sensing hydraulic system.
From Komatsu's published brochure. We keep the source document on file.
Other Komatsu models of a similar weight
Other makes of a similar weight
Operating weight within 2 t of the Komatsu PC138US-8.
Other Komatsu models with the same coupler brackets
Our model tables give these machines the same quick coupler brackets.
Why buy from the factory
- Cutting, machining, welding and painting on one site, our own factory in Poland, EU
- More than 50,000 attachments delivered since 2008
- A record for every serial number, so the spare parts match your attachment
Need Custom Specifications?
We can manufacture attachments to your exact pin spacing and requirements for Komatsu PC138US-8.
Questions about the PC138US-8
- What bucket size fits the PC138US-8?
- Komatsu lists a bucket capacity of 0.8 m³ for it.
For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/komatsu/komatsu-pc138us-8, figures as of 2026-09-10.
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Machine makes and model names belong to their owners. Sieruta is not affiliated with them. We use the names only to show which machines we offer attachments for, by operating weight.